The Titans Tower is the usual base of operations of the Teen Titans. It's a T-shaped headquarters located on a small island. The first and second towers were in the East River in New York City. The third tower was in San Francisco.
Titans Tower is a ten-story glass and steel structure that served as the headquarters for the second incarnation of the Teen Titans, commonly referred to as the New Teen Titans. The original tower was designed and constructed by Silas Stone as a gift for his son, Victor. Silas harbored great guilt and personal responsibility over the fact that he had turned his son into a Cyborg. Recognizing the great depression that Victor had succumbed to, Silas built the tower as a leverage tool in the hopes that Cyborg would become a super-hero and join the New Teen Titans.
The Tower was located on a small island off the East River in Manhattan, New York. Access to the tower required a special identi-card possessed by all members of the Teen Titans. Some former team members such as Aqualad, were also provided with an identi-card, even though the tower didn't exist during the time in which they served as a Titan. Access from the mainland was gained by way of a small raft that traveled back and forth between the island and the mainland daily.
During the second Battle of Trigon, Titans Island, the tower and a significant portion of Manhattan were transformed into a rock-hewn wasteland by the demonic Trigon. Trigon used the roof of the tower as his personal throne. Though the Titans proved victorious in this campaign, Titans Tower was all but destroyed and had to be completely redesigned from the ground up. 
Though often attacked by various villains such as the Fearsome Five and Deathstroke the Terminator, the tower remained intact for several years. When Titans member Jericho betrayed the team and revealed himself as the leader of the Wildebeest Society, he led an attack against the Titans that completely destroyed the tower. 
The second headquarters to bear the name Titans Tower was anything but. This compound was actually an underground facility, built ob top of the remains of the original Titans Tower. Above ground however, an elaborate 3-D hologram transmitted the image of the original Tower manipulating others into believing that the original tower still existed. This facility was used as the headquarters for the Titans.
The third tower was a T-Shaped steel and glass structure located just off San Francisco Bay in San Francisco, California. It is the headquarters of the third incarnation of the Teen Titans and is also the third structure to share the name Titans Tower. The Tower was designed and built by Victor Stone and patterned after the original Titans Tower which was designed by his father Silas Stone. Titans Tower has been the scene of several battles between the Titans and their foes. When Jason Todd returned from the dead and assumed the guise of the Red Hood, he broke into Titans Tower and engaged in a prolonged battle with his successor Robin - a battle which resulted in massive collateral damage.  Later, a group of villains calling themselves the Terror Titans raided the tower and ambushed the only Titan member present, Ravager. Ravager succeeded in saving the lives of two of the tower's guest, Wendy and Marvin, but the Terror Titans set off explosives that destroyed many of the tower's upper levels, including the guest quarters.  Former team member Cyborg was called back to San Francisco to facilitate repairs on the 15th floor.
When the Titans reformed shortly before the Final Crisis, they took up residence in a new structure called the Titans Compound. Though the building maintained its traditional "T" shape, it was not a tower like its predecessors, and served as more of a bunker. The compound was equipped with the same state of the art technology as its precursors, almost all of which were designed by Victor Stone. 
- Although Titans Tower was first seen in DC Comics Presents #26, this was actually just a prophetic dream that Robin had. The tower didn't make its actual first appearance until New Teen Titans #1.
- A blueprint of the original Titans Tower was featured in New Teen Titans (Volume 1) #7.
- Appearances of Titans Tower
- Location Gallery: Titans Tower
- Catalogued images related to Titans Tower